Add PartialEq implementations between ArrayRef and ArrayBase #564

Job	Run time
clippy/stable	31s
docs/nightly	23s
miri	10m 55s
Pass MSRV values to other jobs	3s
format/nightly	13s
nostd/thumbv6m-none-eabi/stable	20s
cross_test/s390x-unknown-linux-gnu/stable	9m 7s
cargo-careful	2m 10s
cross_test/i686-unknown-linux-gnu/stable	2m 43s
blas-msrv	44s
tests/stable	40s
tests/1.64.0	42s
tests/beta	40s
tests/nightly	54s
conclusion	0s
	30m 5s

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